#include <stdlib.h>
#include <time.h>
#include <windows.h>
#include <stdio.h>
#define randomize() srand((unsigned)time(NULL))  // ³­¼ö ¹ß»ý±â ÃʱâÈ­
#define random(n) (rand() % (n))                          //0~n±îÁöÀÇ ³­¼ö ¹ß»ý

#define OK 1
#define NO 2

int incircle(int ax, int ay,int r)
{
	int x = ax , y = ay - r;
	int value = (x*x + y*y);

	if (value <= r*r)
	{
		return OK;
	}
	else
	{
		return NO;
	}
}
void calc(HDC hdc)
{
	int num = 45000;//¸î°³ ·£´ý ¹ß»ý ½Ãų·¡?
	int incount = 0;//¿ø ¾È¿¡ µé¾î°£ Á¡ÀÇ ¼ö
	int* pos_x;//xÁÂÇ¥
	int* pos_y;//yÁÂÇ¥

	int i;//·çÇÁ º¯¼ö
	float pi;//°á°ú°ª pi

	char str[100];

	//µ¿Àû ÇÒ´ç
	pos_x = (int*)malloc(sizeof(int) * num);
	pos_y = (int*)malloc(sizeof(int) * num);

	for(i = 0 ; i < num ; i++)
	{
		pos_x[i] = random(500);//Á¡ ÂïÀ½
		pos_y[i] = random(500);

		if(incircle(pos_x[i],pos_y[i],500) == OK)//¾È¿¡ µé¾î °¡ ÀÖ´ÂÁö È®ÀÎ
		{
			incount++;//µé¾î°¡ ÀÖÀ¸¸é Ä«¿îÆ® Ãß°¡
			SetPixel(hdc,10+pos_x[i],10+pos_y[i],RGB(255,0,0));
		}
		else
		{
			SetPixel(hdc,10+pos_x[i],10+pos_y[i],RGB(0,0,0));
		}
		
	}

	pi = (float)incount / num * 4;//ÆÄÀÌ °è»ê
	sprintf(str,"TestCase : %d, pi = %f",num,pi);
	TextOut(hdc,0,550,TEXT(str),lstrlen(str));
}